diff --git a/requirements.txt b/requirements.txt
index 5db58bc..eea6731 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,6 @@ https://github.com/mikegerber/ocrd_kraken/archive/fix/pass-down-page-id.tar.gz
 ocrd_tesserocr
 
 setuptools >= 41.0.0  # FIXME tensorboard seems to depend on this, but why do we get an error at runtime?
-https://github.com/mikegerber/ocrd_calamari/archive/250a24d.tar.gz
+https://github.com/mikegerber/ocrd_calamari/archive/6d2e15b.tar.gz
 
 https://github.com/qurator-spk/dinglehopper/archive/10f010e.tar.gz